(19)
(11) EP 4 146 906 A1

(12)

(43) Date of publication:
15.03.2023 Bulletin 2023/11

(21) Application number: 21727691.4

(22) Date of filing: 03.05.2021
(51) International Patent Classification (IPC): 
E21B 33/035(2006.01)
 E21B 33/124(2006.01)
(52) Cooperative Patent Classification (CPC):
E21B 33/0355; E21B 33/124
(86) International application number:
PCT/US2021/030428
(87) International publication number:
WO 2021/225941 (11.11.2021 Gazette 2021/45)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 04.05.2020 US 202016866060

(71) Applicants:
  • Saudi Arabian Oil Company
    Dhahran 31311 (SA)
  • Wireless Instrumentation Systems AS
    7018 Trondheim (NO)

(72) Inventors:
  • ARSALAN, Muhammad
    Dhahran, 31311 (SA)
  • FELLINGHAUG, Jarl André
    7018 Trondheim (NO)
  • HANSEN, Stian Marius
    7018 Trondheim (NO)
  • FIKSDAL, Vegard
    7018 Trondheim (NO)

(74) Representative: Fish & Richardson P.C. 
Highlight Business Towers Mies-van-der-Rohe-Straße 8
80807 München
80807 München (DE)

   


(54) DETERMINING THE INTEGRITY OF AN ISOLATED ZONE IN A WELLBORE